var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');


var indexRouter = require('./routes/index');
var loginRouter = require('./routes/login');
var orgRouter = require('./routes/org');
var examRouter = require('./routes/exam');
const loginController = require('./controllers/loginController');



var app = express();

const allowHeaders = "Origin, Expires, Content-Type, X-E4M-With, Authorization";
// 解决跨域问题
app.all("*", function (req, res, next) {
  // 设置允许跨域的域名,*代表允许任意域名跨域
  res.header('Access-Control-Allow-Origin', '*');
  // 允许的header类型
  res.header('Access-Control-Allow-Headers', allowHeaders);
  // 跨域允许的请求方式
  res.header('Access-Control-Allow-Methods', 'DELETE,PUT,POST,GET,OPTIONS');
  if (req.method.toLowerCase() == 'options') {
    res.send(200); // 让options 尝试请求快速结束
  }
  else {
    next();
  }
})

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));


//根据路径,是否异地登录进行拦截处理
app.use(loginController.filterPath);
//登录模块
app.use('/api/login', loginRouter);
//组织架构模块
app.use('/api/orgs',orgRouter);
//考试模块
app.use('/api/exam',examRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
